Expertized Caption Auto-Enhancement for Video-Text Retrieval

The burgeoning field of video-text retrieval has witnessed significant advancements with the advent of deep learning. However, the challenge of matching text and video persists due to inadequate textual descriptions of videos. The substantial information gap between the two modalities hinders a comprehensive understanding of videos, resulting in ambiguous retrieval results. While rewriting methods based on large language models have been proposed to broaden text expressions, carefully crafted prompts are essential to ensure the reasonableness and completeness of the rewritten texts. This paper proposes an automatic caption enhancement method that enhances expression quality and mitigates empiricism in augmented captions through self-learning. Additionally, an expertized caption selection mechanism is designed and introduced to customize augmented captions for each video, facilitating video-text matching. Our method is entirely data-driven, which not only dispenses with heavy data collection and computation workload but also improves self-adaptability by circumventing lexicon dependence and introducing personalized matching. The superiority of our method is validated by state-of-the-art results on various benchmarks, specifically achieving Top-1 recall accuracy of 68.5% on MSR-VTT, 68.1% on MSVD, and 62.0% on DiDeMo.